Re: [PATCH v5 6/6] docs/mm: document latest changes to vm_lock

[Randy Dunlap <rdunlap@infradead.org>]

Hi,

Can someone explain what the (consistent) usage of '!' does in this file?
This is the only file in Documentation/ that uses this syntax.


E.g.:

> diff --git a/Documentation/mm/process_addrs.rst b/Documentation/mm/process_addrs.rst
> index 81417fa2ed20..92cf497a9e3c 100644
> --- a/Documentation/mm/process_addrs.rst
> +++ b/Documentation/mm/process_addrs.rst
> @@ -716,7 +716,11 @@ calls :c:func:`!rcu_read_lock` to ensure that the VMA is looked up in an RCU
>  critical section, then attempts to VMA lock it via :c:func:`!vma_start_read`,
>  before releasing the RCU lock via :c:func:`!rcu_read_unlock`.
>  
> -VMA read locks hold the read lock on the :c:member:`!vma->vm_lock` semaphore for
> +In cases when the user already holds mmap read lock, :c:func:`!vma_start_read_locked`
> +and :c:func:`!vma_start_read_locked_nested` can be used. These functions always
> +succeed in acquiring VMA read lock.

thanks.
-- 
~Randy